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Bug in reboot phase : workaround or patch ?
by Erwan MAS 26 May '10

26 May '10

Hello , I use Centos 5.4 , with the redhat version of xen . I need for some guest to change the hardware for the network . So in my xen config i add the model option in the vif line . When the guest boot , i had the right emulation , but after a reboot , the guest loose the configuration . Someone can confirm the bug in centos 5.5 ? Have someone a patch ? Extract of my config : builder = "hvm" vif = [ 'type=ioemu, mac=00:16:3e:50:10:45, bridge=xenbr0, model=ne2k_pci'] device_model = "/usr/lib64/xen/bin/qemu-dm" #grep spa.*/usr/lib64/xen/bin/qemu-dm /var/log/xen/xend.log [2010-05-24 11:47:23 xend 3782] INFO (image:434) spawning device models: /usr/lib64/xen/bin/qemu-dm ['/usr/lib64/xen/bin/qemu-dm', '-d', '75', '-m', '192', '-boot', 'dc', '-serial', 'pty', '-vcpus', '1', '-k', 'fr', '-domain-name', 'orange', '-net', 'nic,vlan=1,macaddr=00:16:3e:50:10:45,model=pcnet', '-net', 'tap,vlan=1,bridge=xenbr0', '-vnc', '127.0.0.45:1'] [2010-05-24 11:47:40 xend 3782] INFO (image:434) spawning device models: /usr/lib64/xen/bin/qemu-dm ['/usr/lib64/xen/bin/qemu-dm', '-d', '76', '-m', '192', '-boot', 'dc', '-serial', 'pty', '-vcpus', '1', '-k', 'fr', '-domain-name', 'orange', '-net', 'nic,vlan=1,macaddr=00:16:3e:50:10:45,model=rtl8139', '-net', 'tap,vlan=1,bridge=xenbr0', '-vnc', '127.0.0.45:1'] #rpm -qa | grep ^xen xen-libs-3.0.3-94.el5_4.2 xen-3.0.3-94.el5_4.2 #xm info host : james.mas.nom.fr release : 2.6.18-164.6.1.el5.centos.plusxen version : #1 SMP Wed Nov 4 10:10:32 EST 2009 machine : x86_64 nr_cpus : 2 nr_nodes : 1 sockets_per_node : 1 cores_per_socket : 2 threads_per_core : 1 cpu_mhz : 2104 hw_caps : 178bfbff:ebd3fbff:00000000:00000010:00002001:00000000:0000011f total_memory : 4078 free_memory : 1738 node_to_cpu : node0:0-1 xen_major : 3 xen_minor : 1 xen_extra : .2-164.6.1.el5. xen_caps : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32 hvm-3.0-x86_32p hvm-3.0-x86_64 xen_pagesize : 4096 platform_params : virt_start=0xffff800000000000 xen_changeset : unavailable cc_compiler : gcc version 4.1.2 20080704 (Red Hat 4.1.2-46) cc_compile_by : mockbuild cc_compile_domain : centos.org cc_compile_date : Wed Nov 4 09:23:54 EST 2009 xend_config_format : 2 -- ____________________________________________________________ / Erwan MAS /\ | mailto:erwan@mas.nom.fr |_/ ___|________________________________________________________ | \___________________________________________________________\__/

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Re: [CentOS-virt] CentOS-virt Digest, Vol 33, Issue 9
by Musil Stanislav 25 May '10

25 May '10

S pozdravem Stan.M. On 25.5.2010, at 18:00, centos-virt-request(a)centos.org wrote: > Send CentOS-virt mailing list submissions to > centos-virt(a)centos.org > > To subscribe or unsubscribe via the World Wide Web, visit > http://lists.centos.org/mailman/listinfo/centos-virt > or, via email, send a message with subject or body 'help' to > centos-virt-request(a)centos.org > > You can reach the person managing the list at > centos-virt-owner(a)centos.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of CentOS-virt digest..." > > > Today's Topics: > > 1. Re: open-vm-tools 20100425 rpm (David Hollis) > 2. Bug in reboot phase : workaround or patch ? (Erwan MAS) > 3. Re: Bug in reboot phase : workaround or patch ? (Pasi K?rkk?inen) > 4. Re: Bug in reboot phase : workaround or patch ? (Erwan MAS) > 5. Libvirt NAT-based network 2x-4x faster than Libvirt routed > network? (Kenni Lund) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Mon, 24 May 2010 16:02:06 -0400 > From: David Hollis <dhollis(a)davehollis.com> > Subject: Re: [CentOS-virt] open-vm-tools 20100425 rpm > To: centos-virt(a)centos.org > Message-ID: <4BFADB3E.80701(a)davehollis.com> > Content-Type: text/plain; charset=ISO-8859-1 > > On 05/23/2010 04:02 PM, Fernando Gleiser wrote: > >> Do they require any special repos besides the base ones? I'm trying >> to build them on a 32-bit centos 5.4 VM on top of vmware server and >> the build doesn't even start, it fails with: >> >> [root@localhost SPECS]# rpmbuild -ba open-vm-tools-kmod.spec >> error: Failed build dependencies: >> uriparser-devel is needed by open-vm-tools- >> kmod-0-1.20100425.i386 >> kernel-devel-i386 = 2.6.18-164.15.1.el5 is needed by open-vm- >> tools-kmod-0-1.20100425.i386 >> >> the kernel-devel rpm is installed: >> >> [root@localhost SPECS]# rpm -qa | grep kernel >> kernel-headers-2.6.18-194.3.1.el5 >> kernel-2.6.18-164.el5 >> kernel-devel-2.6.18-194.3.1.el5 >> kernel-2.6.18-53.el5 >> >> but uriparser-devel is not in the standard repos: >> >> [root@localhost SPECS]# yum search all | grep uriparser >> [root@localhost SPECS]# >> >> Is anything here I'm missing? > > uriparser-devel is in the EPEL repo. > To rebuild it against a specific kernel, use the kversion define like: > > rpmbuild -ba --define 'kversion 2.6.18-194.3.1.el5' open-vm-tools- > kmod.spec > > > > > ------------------------------ > > Message: 2 > Date: Mon, 24 May 2010 23:16:56 +0200 > From: Erwan MAS <erwan(a)mas.nom.fr> > Subject: [CentOS-virt] Bug in reboot phase : workaround or patch ? > To: centos-virt(a)centos.org > Message-ID: <20100524211656.GB19993(a)voyageur.mas.nom.fr> > Content-Type: text/plain; charset=us-ascii > > Hello , > > I use Centos 5.4 , with the redhat version of xen . > I need for some guest to change the hardware for the network . > So in my xen config i add the model option in the vif line . > > When the guest boot , i had the right emulation , but after a > reboot , the guest loose the configuration . > > Someone can confirm the bug in centos 5.5 ? > > Have someone a patch ? > > > > Extract of my config : > > builder = "hvm" > vif = [ 'type=ioemu, mac=00:16:3e:50:10:45, bridge=xenbr0, > model=ne2k_pci'] > device_model = "/usr/lib64/xen/bin/qemu-dm" > > #grep spa.*/usr/lib64/xen/bin/qemu-dm /var/log/xen/xend.log > > [2010-05-24 11:47:23 xend 3782] INFO (image:434) spawning device > models: /usr/lib64/xen/bin/qemu-dm ['/usr/lib64/xen/bin/qemu-dm', '- > d', '75', '-m', '192', '-boot', 'dc', '-serial', 'pty', '-vcpus', > '1', '-k', 'fr', '-domain-name', 'orange', '-net', > 'nic,vlan=1,macaddr=00:16:3e:50:10:45,model=pcnet', '-net', > 'tap,vlan=1,bridge=xenbr0', '-vnc', '127.0.0.45:1'] > [2010-05-24 11:47:40 xend 3782] INFO (image:434) spawning device > models: /usr/lib64/xen/bin/qemu-dm ['/usr/lib64/xen/bin/qemu-dm', '- > d', '76', '-m', '192', '-boot', 'dc', '-serial', 'pty', '-vcpus', > '1', '-k', 'fr', '-domain-name', 'orange', '-net', > 'nic,vlan=1,macaddr=00:16:3e:50:10:45,model=rtl8139', '-net', > 'tap,vlan=1,bridge=xenbr0', '-vnc', '127.0.0.45:1'] > > #rpm -qa | grep ^xen > xen-libs-3.0.3-94.el5_4.2 > xen-3.0.3-94.el5_4.2 > > #xm info > host : james.mas.nom.fr > release : 2.6.18-164.6.1.el5.centos.plusxen > version : #1 SMP Wed Nov 4 10:10:32 EST 2009 > machine : x86_64 > nr_cpus : 2 > nr_nodes : 1 > sockets_per_node : 1 > cores_per_socket : 2 > threads_per_core : 1 > cpu_mhz : 2104 > hw_caps : 178bfbff:ebd3fbff: > 00000000:00000010:00002001:00000000:0000011f > total_memory : 4078 > free_memory : 1738 > node_to_cpu : node0:0-1 > xen_major : 3 > xen_minor : 1 > xen_extra : .2-164.6.1.el5. > xen_caps : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0- > x86_32 hvm-3.0-x86_32p hvm-3.0-x86_64 > xen_pagesize : 4096 > platform_params : virt_start=0xffff800000000000 > xen_changeset : unavailable > cc_compiler : gcc version 4.1.2 20080704 (Red Hat 4.1.2-46) > cc_compile_by : mockbuild > cc_compile_domain : centos.org > cc_compile_date : Wed Nov 4 09:23:54 EST 2009 > xend_config_format : 2 > > -- > ____________________________________________________________ > / Erwan MAS /\ > | mailto:erwan@mas.nom.fr |_/ > ___|________________________________________________________ | > \___________________________________________________________\__/ > > > ------------------------------ > > Message: 3 > Date: Tue, 25 May 2010 10:43:23 +0300 > From: Pasi K?rkk?inen <pasik(a)iki.fi> > Subject: Re: [CentOS-virt] Bug in reboot phase : workaround or patch ? > To: Discussion about the virtualization on CentOS > <centos-virt(a)centos.org> > Message-ID: <20100525074323.GD17817(a)reaktio.net> > Content-Type: text/plain; charset=us-ascii > > On Mon, May 24, 2010 at 11:16:56PM +0200, Erwan MAS wrote: >> Hello , >> >> I use Centos 5.4 , with the redhat version of xen . >> I need for some guest to change the hardware for the network . >> So in my xen config i add the model option in the vif line . >> >> When the guest boot , i had the right emulation , but after a >> reboot , the guest loose the configuration . >> > > So when you first "xm create" it, it's ok, and after you reboot the > guest, > the NIC model has changed? > >> Someone can confirm the bug in centos 5.5 ? >> > > Did you search Redhat bugzilla? > > > -- Pasi > > >> Have someone a patch ? >> >> >> >> Extract of my config : >> >> builder = "hvm" >> vif = [ 'type=ioemu, mac=00:16:3e:50:10:45, bridge=xenbr0, >> model=ne2k_pci'] >> device_model = "/usr/lib64/xen/bin/qemu-dm" >> >> #grep spa.*/usr/lib64/xen/bin/qemu-dm /var/log/xen/xend.log >> >> [2010-05-24 11:47:23 xend 3782] INFO (image:434) spawning device >> models: /usr/lib64/xen/bin/qemu-dm ['/usr/lib64/xen/bin/qemu-dm', '- >> d', '75', '-m', '192', '-boot', 'dc', '-serial', 'pty', '-vcpus', >> '1', '-k', 'fr', '-domain-name', 'orange', '-net', >> 'nic,vlan=1,macaddr=00:16:3e:50:10:45,model=pcnet', '-net', >> 'tap,vlan=1,bridge=xenbr0', '-vnc', '127.0.0.45:1'] >> [2010-05-24 11:47:40 xend 3782] INFO (image:434) spawning device >> models: /usr/lib64/xen/bin/qemu-dm ['/usr/lib64/xen/bin/qemu-dm', '- >> d', '76', '-m', '192', '-boot', 'dc', '-serial', 'pty', '-vcpus', >> '1', '-k', 'fr', '-domain-name', 'orange', '-net', >> 'nic,vlan=1,macaddr=00:16:3e:50:10:45,model=rtl8139', '-net', >> 'tap,vlan=1,bridge=xenbr0', '-vnc', '127.0.0.45:1'] >> >> #rpm -qa | grep ^xen >> xen-libs-3.0.3-94.el5_4.2 >> xen-3.0.3-94.el5_4.2 >> >> #xm info >> host : james.mas.nom.fr >> release : 2.6.18-164.6.1.el5.centos.plusxen >> version : #1 SMP Wed Nov 4 10:10:32 EST 2009 >> machine : x86_64 >> nr_cpus : 2 >> nr_nodes : 1 >> sockets_per_node : 1 >> cores_per_socket : 2 >> threads_per_core : 1 >> cpu_mhz : 2104 >> hw_caps : 178bfbff:ebd3fbff: >> 00000000:00000010:00002001:00000000:0000011f >> total_memory : 4078 >> free_memory : 1738 >> node_to_cpu : node0:0-1 >> xen_major : 3 >> xen_minor : 1 >> xen_extra : .2-164.6.1.el5. >> xen_caps : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0- >> x86_32 hvm-3.0-x86_32p hvm-3.0-x86_64 >> xen_pagesize : 4096 >> platform_params : virt_start=0xffff800000000000 >> xen_changeset : unavailable >> cc_compiler : gcc version 4.1.2 20080704 (Red Hat >> 4.1.2-46) >> cc_compile_by : mockbuild >> cc_compile_domain : centos.org >> cc_compile_date : Wed Nov 4 09:23:54 EST 2009 >> xend_config_format : 2 >> >> -- >> ____________________________________________________________ >> / Erwan MAS /\ >> | mailto:erwan@mas.nom.fr |_/ >> ___|________________________________________________________ | >> \___________________________________________________________\__/ >> _______________________________________________ >> CentOS-virt mailing list >> CentOS-virt(a)centos.org >> http://lists.centos.org/mailman/listinfo/centos-virt > > > ------------------------------ > > Message: 4 > Date: Tue, 25 May 2010 10:59:38 +0200 > From: Erwan MAS <erwan(a)mas.nom.fr> > Subject: Re: [CentOS-virt] Bug in reboot phase : workaround or patch ? > To: Discussion about the virtualization on CentOS > <centos-virt(a)centos.org> > Message-ID: <20100525085938.GC19993(a)voyageur.mas.nom.fr> > Content-Type: text/plain; charset=iso-8859-1 > > On Tue, May 25, 2010 at 10:43:23AM +0300, Pasi K?rkk?inen wrote: >> On Mon, May 24, 2010 at 11:16:56PM +0200, Erwan MAS wrote: >>> Hello , >>> >>> I use Centos 5.4 , with the redhat version of xen . >>> I need for some guest to change the hardware for the network . >>> So in my xen config i add the model option in the vif line . >>> >>> When the guest boot , i had the right emulation , but after a >>> reboot , the guest loose the configuration . >>> >> >> So when you first "xm create" it, it's ok, and after you reboot the >> guest, >> the NIC model has changed? > > It's a very old bug :-( . > Cf http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=867 > >>> Someone can confirm the bug in centos 5.5 ? >>> > > Centos 5.5 use a new version of xen , and i hope than my bug is > fixed in it , but before upgrade i want > a confirmation . > >> Did you search Redhat bugzilla? > > Yes . > > -- > ____________________________________________________________ > / Erwan MAS /\ > | mailto:erwan@mas.nom.fr |_/ > ___|________________________________________________________ | > \___________________________________________________________\__/ > > > ------------------------------ > > Message: 5 > Date: Tue, 25 May 2010 15:34:17 +0200 > From: Kenni Lund <kenni(a)kelu.dk> > Subject: [CentOS-virt] Libvirt NAT-based network 2x-4x faster than > Libvirt routed network? > To: Discussion about the virtualization on CentOS > <centos-virt(a)centos.org> > Message-ID: > <AANLkTilVG9SoFwr45o_GY-UD-q0htqEnFyuuizNT2JZZ(a)mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-1 > > Hi > > Is it expected behaviour that a libvirt NAT-based network is faster > than a libvirt routed network? > > I would guess that the routed network would be the fastest one in all > cases, but I'm seeing the opposite in my setup. On a 100mbit internet > connection, the routed network tops at 4mbyte/sec, while the nat-based > network goes all the way to 10mbyte/sec. I've spend the last 6 hours > on trying to figure out the cause of this, changing settings, > reinstalling the system, but the problem persists and I can't find the > cause of it. > > It is a clean and fairly simple setup: > - Clean installation of CentOS 5.5 > - Installation of kvm+libvirt+virt-manager+xorg > - iptables service disabled > - 1 public IP for the host (xxx.yyy.zzz.215) on a /32 subnet with > xxx.yyy.zzz.193 as gateway > - 3 public IP for the routed network (xxx.yyy.zzz.251-253) on a /26 > subnet with the same gateway as the host > - 1 virtual machine with either the NAT or the routed libvirt > network assigned > > I have no networking connection errors or similar, it works perfectly > with both the NAT and the routed network, but the routed network is > just 2-4 times slower than the NAT one. > > Do you have any suggestions of what the problem might be? When I look > at the iptables rules generated by libvirt, and the routing table, > everything looks fine AFAICT. Traceroute from guest doesn't reveal > anything either. Ping times from the two networks are similar, so the > main issue seems to be throughput. > > Any help or pointers to what I should look at, is highly > appreciated... :) > > I've copy pasted some of my relevant system configuration into > pastebin: > http://pastebin.com/jtTrHLqA > > Thank you, > Kenni > > > ------------------------------ > > _______________________________________________ > CentOS-virt mailing list > CentOS-virt(a)centos.org > http://lists.centos.org/mailman/listinfo/centos-virt > > > End of CentOS-virt Digest, Vol 33, Issue 9 > ******************************************

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open-vm-tools 20100425 rpm
by David Hollis 24 May '10

24 May '10

All, I've updated the open-vm-tools packages that have been floating around to the latest release - 4/25/2010 - for those that are interested. There is quite a bit of new additions/changes over the past year such as the addition of a fuse driver for vmblock devices, vmxnet3, pvscsi, etc. SRPMS and .spec's available here: http://www.davehollis.com/packages/open-vm-tools-kmod.spec http://www.davehollis.com/packages/open-vm-tools.spec http://www.davehollis.com/packages/open-vm-tools-kmod-0-1.20100425.el5.src.… http://www.davehollis.com/packages/open-vm-tools-0-1.20100425.el5.src.rpm

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Choices for shared network storage, NFS vs iSCSI
by Steven Ellis 19 May '10

19 May '10

Has anyone here ran performance comparisons between NFS and iSCSI when using network storage for KVM based guests. Also which have people found to be easier for managing live migrates etc. Steve -- Steven Ellis - Bulletin.Net Inc - http://www.bulletin.net

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SPICE anyone?
by compdoc 19 May '10

19 May '10

There was mention of some support for SPICE in RHEL 5.4, and mention again of improved support in 5.5, but it sounds like their main goal is to implement it in RHEV. Is there an easy way to implement SPICE with 5.5? Or should I download the source and compile it from spice-space.org? Thanks...

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Slightly OT - Grub fallback option
by Ben M. 18 May '10

18 May '10

Does anyone have a standard install of CentOS virtualization grub.conf working in a proven state with the FALLBACK option? If so, can you post your grub.conf? I mistakenly updated to 5.5 and am concerned about nvidia driver comments in the release notes. I did not have protectbase configured on this machine. It is a remote device that will reboot.

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RHEL 5.5 Xen fixes
by Pasi Kärkkäinen 15 May '10

15 May '10

Hello, RHEL 5.5 has been released, and it contains many Xen related fixes. Here's the most important of the them.. fixing a dom0 caching bug which could cause domU disk corruption when the domU disk was accessed from dom0 after the domU was shutdown. Most people noticed this bug when pygrub used wrong (cached) information. "pygrub uses cached and eventually outdated grub.conf, kernel and initrd": https://bugzilla.redhat.com/show_bug.cgi?id=466681 And some more: "Xen hypervisor doesn't mask xsave feature from the guest; Fedora 11 PV domU kernel crashes": https://bugzilla.redhat.com/show_bug.cgi?id=524719 "[RHEL-5 Xen]: F-11 Xen 64-bit domU cannot be started with > 2047MB of memory": https://bugzilla.redhat.com/show_bug.cgi?id=502826 " Boot hang when installing HVM DomU": https://bugzilla.redhat.com/show_bug.cgi?id=524052 "[RHEL5 Xen]: PV guest crash on poweroff": https://bugzilla.redhat.com/show_bug.cgi?id=540811 "[RHEL5 Xen]: Cpu frequency scaling is broken on Intel": https://bugzilla.redhat.com/show_bug.cgi?id=553324 RHEL 5.5 kernel changelog: http://rhn.redhat.com/errata/RHSA-2010-0178.html Work-in-progress (Not yet in 5.5): "Grub2 guest support for RHEL5 Xen pygrub": https://bugzilla.redhat.com/show_bug.cgi?id=577511 -- Pasi

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Simulate Network Cable Disconnect
by Tait Clarridge 13 May '10

13 May '10

Hello All, I am having trouble simulating a network cable disconnect with KVM. I would like to test active backup bonding for a switch IOS upgrade in a production environment. Basically I have the VM running on a bridged network which is also tied into GNS3 simulating a small-scale version of the production environment. I have tried bringing down the vnetX interface and the actual virtual network itself (virbrX) with no luck. Has anyone had to do this before/maybe knows some tips? If more info is required about my setup, I can give it. Thanks! Tait

2 3

Maximum disks to allocate on kvm guests
by carlopmart 03 May '10

03 May '10

Hi all, Somebody knows how many virtio disks can be allocated for one kvm guest?? I am searching on redhat's docs about this without luck. Thanks. -- CL Martinez carlopmart {at} gmail {d0t} com

1 0

peth0 unavailable for virt-manager virt-install
by Ed Donahue 29 Apr '10

29 Apr '10

Command just times our for me virt-install --paravirt --vcpus=4 --name server1 --ram 4096 --file /opt/xen-images/hlcnwmmp01.img -x "ks=http://10.203.1.11/kickstart/ks-xen.cfg" --file-size 40 --location http://128.61.111.11/pub/centos/5.4/os/x86_64 -b peth0 Starting install... Retrieving file vmlinuz... | 1.9 MB 00:00 Retrieving file initrd.img... | 7.1 MB 00:01 POST operation failed: xend_post: error from xen daemon: (xend.err 'Device 0 (vi f) could not be connected. Hotplug scripts not working.') Domain installation may not have been successful. If it was, you can restart your domain by running 'virsh start server1'; otherwise, please restart your installation. virt-mamanger doesn't display any options for physical interface xen-3.0.3-94.el5 libvirt-0.6.3-20.1.el5_4 virt-manager-0.6.1-8.el5 xen-libs-3.0.3-94.el5 kernel 2.6.18-164.15.1.el5xen peth0 is there: eth0 Link encap:Ethernet HWaddr 00:21:9B:9B:A7:56 inet addr:10.202.3.66 Bcast:10.202.255.255 Mask:255.255.0.0 inet6 addr: fe80::221:9bff:fe9b:a756/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:3452114 errors:0 dropped:0 overruns:0 frame:0 TX packets:1924908 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:4900895721 (4.5 GiB) TX bytes:227380539 (216.8 MiB) peth0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link UP BROADCAST RUNNING NOARP MTU:1500 Metric:1 RX packets:4415207 errors:0 dropped:6356 overruns:0 frame:0 TX packets:2505255 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:6274073430 (5.8 GiB) TX bytes:277402952 (264.5 MiB) Interrupt:24 Memory:d6000000-d6012800

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